These are the Kaplan 2008 Webprep RENAL Physiology audio lectures (of the orig. videos). However, unfortunatley there are NO accompanying slides with the audios. Nonetheless, using any Kaplan 2008 Physio. book can sufficiently serve in-place of the slides.

Just to clearify, Kaplan 'WEBPREP' lectures are different from the 'CENTERPREP' lectures because the former are only condensed, high yield versions of the the latter. Therefore, WEBPREP is especially useful for those short on study time. Hope it helps & good luck.